@article {422801,
	title = {Holographic Metalens for Switchable Focusing of Surface Plasmons},
	journal = {Nano Letters},
	volume = {15},
	year = {2015},
	pages = {3585},
	url = {http://dx.doi.org/10.1021/acs.nanolett.5b01076},
	author = {Daniel Wintz and Patrice Genevet and Antonio Ambrosio and Alex Woolf and Federico Capasso}
}
